Firebug includes a powerful JavaScript debugger that lets you pause execution at any time and see what each variable looked like at that moment. If your code is a little sluggish, use the JavaScript profiler to measure performance and find bottlenecks fast. http://www.dapfor.com/en/net-suite/net-grid/tutorial/data-types[^]

Create another field with the HASH of that varchar(500), and put a UNIQUE CONSTRAINT on the hash field: HASH BYTES('md5', My Long VarcharField) This will cause poor performance but if you have a varchar(500) where you need to enforce uniqueness I'm assuming performance isn't on the forefront of your considerations anyways. http://www.dapfor.com/en/net-suite/net-grid/tutorial/data-binding

It may help you .read it. http://www.dapfor.com/en/net-suite/net-grid/tutorial